from control import sisotool
from control import rlocus
from control import tf

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0,2*np.pi,50)
y = np.sin(x)
#plt.plot(x,y)

Gs = tf([1000],[1,25,100,0])

#rlocus(Gs)

sisotool(Gs)

plt.show()